Sanford k



(ModeL) 2 Sheets-Sheet .2. S. K. WEYMOUTH. COMBINATION LOCK.

Patented Apr. 14', 1891.

\ baryblsd If Wgymouth UNITED STATES PATENT OFFICE.

SANFORD K. \VEYMOUTH, OF GARDINER, MAINE, ASSIGNOR TO THE WEYMOUTH LOOKCOMPANY, OF SAME PLACE.-

COMBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 450,207, dated April14, 1891. Application filed July 11, 1890. $erial1l0- stems. (ModeL) Toall whom it may concern.-

Be it known that I, SANFORD K. WEYMoUTH, a citizen of the United States,residing at Gardiner, in the county of Kennebec and State of Maine, haveinvented a new and useful Oombination-Lock, of which the following is aspecification.

This invention relates to combinationdocks and it has for its object toconstruct a device of this class which shall be simple, inexpensive, andeasily operated, and which shall be capable of being successfullyapplied to ordinary door locks and latches.

My invention consists in the improved arrangement and combination ofparts which will be hereinafter fully described, and particularlypointed out in the claims.

In the drawings, Figure 1 is a perspective front view of my improvedcombination-lock, showing the same applied to a door-latch of ordinaryconstruction. Fig. 2 is a sectional View of the device takenlongitudinally through the central shaft. Figs. 3 and 4 are transversesectional views taken on the lines '3 3 and 4 4, respectively, in Fig.2. Fig. 5 is a detail view of the cylindrical shell. Fig. 6 is a detailview of the casing containing the locking-pawl and to which thecylindrical shell is applied. Figs. 7,8, 9, and 10 are detail views ofthe disks or plates having the inwardly-extending arms by which thelocking-pawl is manipulated. Fig. 11 is a detail view showing the pins,by means of which the plates 7, S, and 9 are manipulated. Fig. 12 is adetail view of one of the dummy-pins. Like numerals of referenceindicate like parts in all the figures.

My invention may be described as consisting, essentially, of thecylindrical shell connected pivotally with a casing, which is in turnmounted in the casing of the lock to which the device is applied. Saidcylindrical shell is provided with a radial arm adapted to bear againsta stud or projection upon the bolt or latch, which may thus be thrown bypartially rotating the cylindrical case or shell. Thelatter is normallyheld locked by the action of a series of longitudinally-sliding armsattached to plates or disks; and the invention has for its object toprovide mechanism by means of which the said disks may be displaced inregular order, so as to place the device in condition for unlocking.

1 designates the lock-case.

2 is a casing mounted in the latter and containing the locking-pawl 3.The lock-case 1 also contains the spring-actuated bolt orlatch 4, whichis provided with a lug or stud 5, adapted to be engaged by an arm 6,which extends radially from the cylindrical shell 11. Said cylindricalshell is closed at both ends and is provided at its front and rear endswith central perforations 12 and 15. The ends of the cylindrical shellare also provided with perforations or bearings 14, of which there arefour grouped around the central perforations 12 and 15.

16 designates a disk or plate, to the rear side of which another disk 17is connected by means of posts, which hold the said disks or plates ashort distance apart. The said disks or plates are provided with aseries of perforations which are in alignment with each other and ofwhich there may be any desired number, each being marked or designatedby a letter of the alphabet or by some other suitable distinguishingcharacter, which is imprinted or engraved upon the face of the frontplate 16. The rear plate 17 is also provided with a central perforation18, from which extends a shaft 19, which is secured to the rear side ofthe plate 16. The shaft 19 extends through and'has bearings in theperforations 12 and 15 in the cylinder 11.

7, 8, 9, and 10 designate a series of plates or disks, which are mountedupon the shaft 19, which extends rearwardly from the plate 17, saiddisks being provided with central perforations sufficiently large toaccommodate the shaft 19. To retain the said disks in the desiredposition with relation to each other, I provide each one with aperforation 21, aligning with a pin 22, that extends rearwardly from theplate or disk 17. Each of the disks 7, 8, 9, and 10 is provided with arearwardly-extending arm 23, the real-most disks 7, 8, and 9 beingprovided with perforations 24 for the passage of the arms extending fromthe disks in front. The disks 8, 9, and 10 are additionally providedwith perforations 25, aligning with the perforations designated by 26 inthe plates 1.6 and 17,

which are distinguished by letters of the alby 27, are dummies, and saidpins are provided at their inner ends with heads or en-.

largements 28, which are larger than the perforations 26, and alsolarger than the perforations in the adjacent plate or disk 10.

It should here be stated thatthe perforations 25 in the plate 9 are tobe smaller than those in the adjacent plate 10, while those in the plate8 are to be smaller still. The plates or disks 7, 8, and 9 may inpractice be pressed in a rearward direction by means of theoperating-pins, which are designated, respectively, by 29, 30, and 31.The inner ends of said operating-pins are reduced so as to enable themto pass through the perforations in the plates 8, 9, and 10,respectively, and the said pins are provided with shoulders or flanges32 to enable them to be retained in the perforations in the plates 16and 17 without danger of pulling out.

33 designates a pin,which extends through suitable perforations in allof the plates 16, 17, 10, 9, 8, and 7, and which also has a hearing inthe front end of the cylindrical shell 11. The pin 33 is provided infront of the plate 16 with a head 34, by means of which it may bereadily grasped and manipulated to pull in a forward direction themovable plates 7, S, 9, and 10, in rear of which the said pin isprovided with an annular flange or shoulder to bear against the rearplate 7.

The edge of the plate 16, which is in practice grasped for the purposeof operating the lock, may be milled, as shown at 36, and a suitableshell or casing may be provided, if thought desirable, to protect thisportion of the lock from the weather.

The casing 2, which is in practice mounted in the lock-case 1, as hereindescribed, is composed of the front and rear cheeks or side pieces,which are designated, respectively, 36 and 37, which are connected bymeans of bolts or posts, whereby they are spaced a suitable distanceapart to accommodate between them the pawl or dog The latter is providedwith a notch or slot 38, whereby it is mounted upon a pin or stud 39 insuch a manner as to be capable of a limited sliding in addition to itspivotal movement. A spring 40 is provided, which bears against the heelend of the pawl, thereby'serving to retain the said pawl in its normalposition, with its point resting or bearing against a lug or stud 41.The front side 36 of the lock-case is provided with a circular opening42, concentric with the stem 19, which is extended through a bearing 43in the rear side of the casing 2, and is provided in rear of the latterwith a nut 44, serving to secure the parts together. At the perimeter ofthe opening 42 at intervals of ninety degrees are formed notches 45,which are in alignment with and adapted to receive the inner ends of thearms 23, that extend rearwardly from the plates 7, S, 9, and 10. Saidarms in fact normally occupy positions in these notches, and therebylock the combination by preventing the cylindrical shell 11, having thearm 6, to be turned so as to engage and operate the latch 4.

Each of the arms 23, extending from the plates or disks 7, 8, and 9, ispeculiarly beveled at its rear or inner end, as will be seen at 46. Eachof said arms is also provided near its rear end and in what may betermed its outer side, thereby implying the side which is farthest fromthe shaft or axle 19, with the notch or recess 47. The arm 23, whichextends from the plate 10, is left plain. The dog or pawl 3 in thecasing 2 is provided with slots or openings 48 and 49. The outer or rearside of the casing 2 is also provided with a segmental slot 50 and witha perforation 51 to accommodate the points or ends of the arms 23.

Upon the front end of the cylindrical shell 11 or between the arms 23are placed friction disks 52, of leather, rubber, or other suitablematerial, the purpose of which is by bearing against the said arms toretain them in any position to which they may be adjusted and to preventthem from being jarred or acci dentally displaced from the positionwhich they are caused to assume by the operation of unlocking thecombination.

The manner of operation of my combination-lock-will be readilyunderstood from the foregoing description, taken in connection with thedrawings hereto annexed, by those skilled in the art to which itappertains. The combination may readily be set by adjusting theoperating-pins 29, 30, and 31 in any of the perforations 26 in theplates 16 and 17 which may be selected. In the remaining perforations 26the dummy-pins 27 are placed, all of which extend in front of the plate16 precisely the same distance as the pins 29, 30, and 31, and all ofsaid pins are to all appean ances alike. To unlock the combination, thepin 29, by which the disk 7 is operated, is first pressed in a rearwardor inward direction, thus forcing rearwardly the plate 7 and its arm 23,the beveled inner end of which is so arranged as to bear against theinner edge of the dog or pawl 3, forcing the latter slightly in anoutward direction from its normal position. It must here be stated thatone of the perforations in said pawl is normally in alignment with thearm extending from the disk 8; but the pawl is by the action of the armextending from the disk 7 displaced to such an extent that the point ofthe arm 23, extending from the disk 8, shall, when the latter is forcedrearwardly, engage the inner edge of said pawl and still furtherdisplace the same, so that its inner edge ,will be engaged by .the arm23,extending from the disk 9, when the latter in turn is forced in arearward direction. It will thus be seen that I am enabled to force thesaid plates with the arms successively in a rearward direction until thepawl is displaced and the notches 47 at the outer ends of the arms 23are 'in alignment with the front plate 36 of the casing 2. Thecylindrical shell 11 may then, by grasping the plate or disk 16, beturned, thus causing the radial arm 6 to engage the stud 5 of bolt 4 andunlock the latter. To lock the combination the shell is turned in theopposite direction and the plates 7, 8, and 9 are restored to theirnormal position by pull ing the pin 23.

It will be seen that in case the operatingpins 29, 30, and 31 areoperated in any but their regular order of succession it would beimpossible to open the combination, for the reason that the points ofthe arm 23 would enter the perforations in the pawl 3,, thus positivelypreventing the shell from being turned. Likewise if one of thedummy-pins should be pressed the several plates 7, 8, 9, and 10 would besimultaneously forced in a rearward direction, and the arm 23, extendingfrom the plate 10, would then pass through the pawl 3 and enter theperforation 51 in the rear plate 37 of the casing 2, thus holding thedevice securely from being unlocked.

From the foregoing description, taken in connection with the drawingshereto annexed, the operation and advantages of the invention will bereadily understood by those skilled in the art to which it appertains.

lhe device is simple in construction and may be manufactn red at amoderate expense. I desire it to be understood thatI reserve theprivilege of applying my invention not only to latch-bolts, asillustrated in the drawings hereto annexed, but to any other form oflock to which it may be found applicable. I also reserve the right tomake any such changes and modifications in the general structure of thelook as may be resorted to without de parting from the spirit of myinventionsuch as, for instance, increasing or decreasing the number ofthe sliding disks or plates carrying the arms 23 and correspondinglymodifying the construction of the other parts of the device.

Having thus described my invention, I claim- 1. In a combination-lock,the combination of a locking-pawl journaled in a suitable casing, ashell connected pivotally with the said casing, a series of plateshaving arms extending through the said shell and adaptedto engage thelocking-pawl, and means for pressing the said plates in regularsuccession in a rearward direction, substantially as and for the purposeset forth.

2. In a combination-lock, the combination of the lock-case, thespring-actuated bolt or latch having a lug or stud, a locking-pawlmounted in a casing within the lock-case, a cylindrical shell connect-edwith said casing by a longitudinal shaft, the plates or disks havingarms extending longitudinally through said shell and having beveled endsadapted to engage the inner edge of the pawl and notches to engage thefront side of the casing, a plate or disk having an arm extendinglongitudinally through the cylindrical shell and adapted to engageperforations in the locking-pawl and in the outer side of the easing,the pins mounted in suitable guide-plates and adapted to successivelyengage the plates having the inwardly-extending arms provided withbeveled points, and the dummy-pins adapted to engage the plate havingthe in wardly-extending arm adapted to engage perforations in the pawland in the rear side of the casing, substantially as and for the purposeset forth.

3. In a combination-lock of the class described, the combination of thedisks 7,8, and 9, having arms 23, provided with beveled points andnotches 47, the disk 10, having arm 23, the cylindricall shell 11,having arm 6, the guide-pin 22, the operating-pins 29, 30, and 31, thepin 33, havinghead 34 and shoulper 35, the center shaft 19, the casing2, and the pawl 3, mounted in the latter, all arranged and operatingsubstantially as and for the purpose set forth.

'4. In a combination-lock of the class'described, the combination of thecylindrical shell with the disks having the inwardly-er tending armsmounted in said shell, and the friction-blocks attached to the latterbetween the said arms, substantially as and for the purpose set forth.

5. In a' combination-lock, the disks or plates 7, 8, 9, and 10, havingperforations, as herein described, in combination with the operatingpins29, 30, and 31, having reduced inner ends and provided with annularflanges 32, and the guide-plates 16 and 17, having perforations formingseats for the said operatingpins, substantially as set forth.

6. In a combination-lock of the class herein described, the combinationof the guide-plates 16 and 17, having perforations, as described, theoperating-pins 29, 30, and 31, having reduced inner ends, the dummy-pins27, having enlarged heads 28, the disks or plates 10, 9, and 8, havingperforations of gradually-decreasing size and provided withinwardly-extending arms 23, having beveled points 4.6 and notches 47,the disk 7, having inwardly-extending arm 23, and the guide-pin 22,extending through perforations in the disks 10, 9, 8, and 7,substantially as and for the purpose set forth.

7. The combination of the casing2, the front side of which is providedwith a circular opening having offsets 45 and the rear side of which hasa segment-slot 50 and a perforation 51, the pawl 3, having slot 38,where- IIO by it is mounted upon a pin 39, the slots 48 and 49, thespring 40, the stud 41, the pivoted cylindrical shell having disksprovided with inwardly-extending arms to engage said pawl, and mechanismfor manipulating the said disks in the manner described, and for thepurpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses. v

SANFORD K. WVEYMOUTH.

'Witnesses:

S. S. VVRIGHT, JOHN MILTON.

